JB_T 7248-2024《阀门用低温钢铸件技术规范》.pdf_规范标准

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JB_T 7248-2024《阀门用低温钢铸件技术规范》.pdf

资源分类

规范标准

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更新时间

2025-07-24

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百度

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https://pan.baidu.com/s/11WlqF8hEABFKp16f1M6E9Q?pwd=8tui

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